Wrench



8.1. NORDSTROM.

WRENCH.

APPLICATION FILED MAR. 21, l9l9.

1,360,670. Patented Nov. 30, 1920.

' 2 SHEETS-SHEET 1.

S. J. N ORDSTROM. WRENCH. APPLICATION FILED MAR. 21.1919- Patented Nov. 30, 1920.

2 SHEETS-SHEET 2- INVENTO 4 2 BY I 6 @ATTORNEY ire TN -Ei.

SVEN JOHAN NOBDSTROM, OF SAN NCISCO, CALIFORNIA.

wanivcn.

Specification of Letters IPatent.

latented Nov. 36, 11.920.

provement in Wrenches, and more particularly to an improvement in wrenches for operating a valve provided with a relatively movable part, a valve of such construction being shown and described in the Nordstrom Reissue Patent No. 14,516, reissued August 27,1918.

The object of the invention is to produce a wrench of the above described type, and construct it in such manner that when it is applied to operating a valve or other member provided with a relatively movable part, the movable part may at times be moved rela-. tively to the member and at other times the member and itspart will be moved or turned without relative movement. More specifically, the object of the invention is to producea wrench for operatin the valve of the said Nordstrom patent so t at each time the valve is operated, that is to say, opened and closed, the screw for forcing the lubricant into the valve parts will be turned relatively to the valve plug so as thereby to lubricate the valve. To the accomplishmentsgf this object the invention consists in the wrench described and claimed in the following specification In the accompanying drawings illustrat: ing the preferred form of the invention, Figure 1' is a section taken on the line 11 of Fig. 2; Fig. 2 is a top plan of the wrench as applied to the valve, the parts being shown at the beginning of the valve turning movement of the wrench; Fig. 3 is a view similar to Fi 2 with the parts shown at the beginning 0 thescrew turning movement of the wrench; Figs. 4 and 5.are sections taken on the line 4-4 of Fig. 1 with the parts shown in the positions as indicated in Figs. 2 and 3 respectivelyyFigs. 6 to 8, inclusive. show a modified form of the invention, Fig. 6 being a sectional side eleva tion, Fig. 7 a top plan, and F1 8 a section taken on the line 88 of Flg. and Fig. 9 is a vertical section of a valve similar to that shown in Fig. 1 of the said Nordstrom patent.

The wrench of the present invention is adapted for use in operating a turnable member or element having a part movable relatively to itself, where it is at times necessary or desirable to move or adjust the movable part relatively to the turnable member, and where at other times it is necessary or desirable to turn the member and part without relative movement between them. Such construction and arrangement of elements is exemplified in the valve shown and described in the said Nordstrom patent and in the valve parts illustrated in the accompanying drawings. The valve parts necessary to illustrate the function of the wrench of the lnvention comprise a tapered valve plug 9, hereinafter for convenience referred to as the valve, seated within a valve chamber 10, and havin a valve stem'll, the upper end 12 of whic is squared. The valve stem 11 is provided axially with a threaded hole 18 in which is received a lubricating screw 14 having a hole 15 in its upper end for the reception of a pin by which the screw maybe turned. Within the upper end ofthe tapered plug portion of the valve is a transverse hole 16 passing through the bottom of the threaded hole 13 and terminating at op osite points on the periphery of the valve. Shannels 18 communicate with the hole 16 and with a chamber 19 formed atfthe bottom of the valve casing 20. Thethreaded hole 13 is filled with a lubricant before the screw 14 is inserted and when the latter is screwed part way down into the hole the pressure on the lubricant forces it through the hole 16 down the channels 18 and into the chamber 19. thereby providing lubrication for the valve. When more lubrication is needed, the lubricating screw 14 is turned. If at any time it is found that the valve is frozen in its seat, the lubricating screw is turned until enough lubricant is forced into the chamber 19 to lift the valve, as set forth and more fully explained in said patent.

It has been found desirable in the operation of the above described valve to lubricate it each time the'valve is opened and closed. This has heretofore been inconvenient of accomplishment where the valve is situated in a diflicultly accessible place. To obviate this inconveniencathe wrench of the present invention has been provided, so constructed that when the wrench is manipulated to open and close the valve thelubricating screw is turned to force fresh lu bricant down the channels 18 on to the valve seat. The wrench shown in the form' of the invention illustrated in Figs. 1 to 5, inclusive, comprises a handle 22, by which .the wrench may be manipulated, and a socket 23 adapted for engagement with the squared the surfaces 25 of the wrench socket contact with the surfaces of the squared end of the valve stem.

This play or lost motion between the wrench socket and the valve is availed of to turn the lubricating screw relatively to the valve during the operation of the valve. The screw may be turned in the valve either during the opening or closing movement. In the arrangement of the parts shown in the drawings, the lubricating screw is turned in the valve during the valve closing movement of the wrench. For this purpose,

the lubricating screw is provided with a right-hand thread and this thread, for the greater part of its length, is provided with a series of teeth or notches 26 formed longitudinally of the screw, but which do not extend to the full depth of the thread, asclearly appears'in Fig. 1. It has been found that about a one-sixteenth turn of the lubricating screw forces out enough lubricant for a single lubrication of the valve and so there is conveniently provided sixteen teeth on the periphery of the lubricatingscrew by which it may be engaged and turned. The teeth 26 are engaged by a pawl or spring pressed plunger 27 slidingly received in a lug or housing 28 on the upper side of the wrench socket. A spring 29 presses the toothed end 30 of the pawl toward and into engagement with the teeth 26. A pin 31 in the rear end of thepawl slides in a groove 32 in the lug 28 to prevent the pawl from turning. By means of the pin the pawl may be disengaged from the teeth 26 so that the lubricating screw may be removed for the insertion of a fresh supply of lubricant. There maybe any convenient number of teeth or notches on the lubricating screw; if a greater or less number than 16 is employed, the number of degrees of play or lost motion between the wrench socket and the valve will be lessened or increased accordingly, in order to permit the turning of the screw in the valve through at least the arc defined by one of the teeth or notches.

The valve is turned through 90 in one direction to open it and through 90 in the opposite direction to close it. At the end of the valve opening movement, the valve and wrench parts are left in the position indicated in Fig. 3. If, now, it is desired to close the valve, the wrench will be turned in a clockwise direction. The preliminary turning movement of the wrench, that is to say, its manipulation through an arc of 30 in moving it from the position shown in Fig. 3 to the position shown in Fig. 2, does not turn the valve. This preliminary manipulation of the wrench does, however, advance the screw one tooth or notch so as thereby to lubricate the valve. It is thus seen that the valve is lubricated before its closing movement is begun. The further manipulation of the wrench through 90 closes the valve, and during the closing of the valve there is no relative movement between the pawl rides over the next succeeding tooth or notch into position to advance'the lubricating screw one tooth on the next closing of the valve. On the further turning of the wrench in an anti-clockwise direction, the

valve, screw and wrench turn without rela-' tive movement between them into the position of Fig. 3. It will be observed that 30 being one-twelfth of a circle, the movement of the wrench through its first 30 in its anti-clockwise direction is more than sufficient for. the purpose of enabling the pawl to engage a fresh tooth, as shown in Fig. 3. To lubricate the valve before the valve is opened, the lubricating screw would be provided with a left-hand thread and the teeth or notches 26 would point in the opposite direction.

' If on attempting to close the valve it is found to be frozen in its seat, the wrench will be manipulated forward and backward a number of times through the preliminary 30 of screw turning movement until enough lubricant is forced into the chamber 19 to free the valve in its seat.

The function and mode of operation'of the form' of wrench shown in Figs. 6, 7 and -8 are exactly the same as the function and the cylindrical socket 37 of the wrench, the

handle of which is indicated at 38. The

wrench socket fits the bushing loosely so,

that it may'turn easily thereon. From the top of the bushing rise two lugs or cars 39 and 40 which are adapted to be engaged by two lugs 41 and 42 formed on the top of the wrench socket. The wrench may be turned in either direction before the lugs 41 and housing 43, which houses a pawl arrange ment like the form shown in Figs. 1, 2 and 3. By reference to Fig. 7, it will be seen that when the wrench is turned in a clockwise direction the first 30 of movement effects the turning of the lubricating screw in the valve, then the remaining 90 of movement closes the valve. And, reversely, the first 30 of movement in an anti-clockwise direction causes the pawl to pass over the next succeeding tooth into position to advance the lubricating screw one tooth on the next closing of the valve and the remaining 90 of movement opens the valve.

It will be understood that the invention may be embodied in forms other than those shown and described and still be within the scope of the'following claims.

Having thus described the invention, what I claim as new is I V 1. A wrench for operating a turnable member provided with a relatively-movable part comprising means for engaging the turnable member and means for engaging the relatively-movable part, said first named means being provided with means for permitting lost motion between the turnable member and itself when the latter is turned so that the relatively-movable part may be moved relatively to the turnable member.

2. A wrench for operating a turnable member provided with a relatively-movable part, comprising a handle, a socket for engaging the turnable member and a springpressed pawl for engaging the relativelymovable part, said socket being provided with nieans for permitting lost motion between the turnable member and the socket when the latter is turned so that the relatively-movabl'e part may be moved relatively to the turnable member.

3. A wrench for operating a valve having a stem and provided with a screw having ratchet teeth, comprising a handle, a socket for engaging the valve stem and a spring-pressed pawl for engaging the ratchet teeth, said socket being provided with means for permitting sufiicient lost motion between the valve stem and'the socket when the latter is turned so that the screw may be turned relatively to the valve.

SVEN J OHAN NORDSTROM. 

